diff --git a/playground/build b/playground/build
index 4b3a64a..ac1dc3a 100755
--- a/playground/build
+++ b/playground/build
@@ -3,7 +3,7 @@ mkdir -p public
 echo build lsp.js
 (cd .. && make lsp)
 echo build newt worker
-esbuild src/worker.ts --bundle --format=esm --platform=browser > public/worker.js
+esbuild src/worker.ts --minify --bundle --format=esm --platform=browser > public/worker.js
 esbuild src/frame.ts --bundle --format=esm --platform=browser > public/frame.js
 cp -r static/* public
 (cd samples && zip -r ../public/files.zip .)